Duplex striping mechanism for circular-knitting machines.



W. Pf YOUNG. DUPLEX STRIPING MEGHANISM FORGIRGULAR KNITTING MACHINES.

APPLICATION FILED JUNE 18, 1904.

Patented July 26, 1910.

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W. P. YOUNG. DUPLEX STBIPING MLGHANISM FOR CIRCULAR KNITTING MACHINES.

APPLICATION FILED .TUNE 1B. 1904.

Patented July 26, 1910.

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W. P. YOUNG. DUPLEX STRIPING MEGHANISM FOR CIRCULAR KNITTING MACHINES.

APPLICATION FILED JUNE 18, 1904. 965,428, v Patented July 26, 1910.

` W. P. YOUNG. DUPLEX STRIPING MECHANISM FOR CIRCULAR KNITTING MACHINES.

APPLICATION FILED JUNE 1B. 19-04.

Patented July 26, 1910.

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fr @gf UNITED STATES PATENT OFFICE.

WILLIAMI. YOUNG, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO AMERICANKNITTING MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORA- TIONOF NEI/V JERSEY.

Specification of Letters Patent.

Patented July 26, 1910.

Application led June 18, 1904. Serial No. 213,163.

To all whom "Lt may concern:

Be it known that I, WILLIAM P. YOUNG, a citizen of the United States ofAmerica, and a resident of Philadelphia, in the county ofPhiladelphia,\- State of Pennsylvania, (formerly of Providence, in thecounty of Providence, in the State of Rhode Island,) have inventedcertain new and useful Improvements in Duplex Striping Mechanisms forCircular-Knitting Machines, of which the following is a specification.

This invention is especially applicable to circular knitting mechanismsfor the production of seamless stockings and socks.

The principal object of this invent-ion is to provide a circularknitting machine with a combined striping and lacing attachment capableof forming circumferential stripes of dierent colors by the use of twoor more threads and longitudinal stripes of lacework or different colorsextending through the horizontal color stripes, which attachment can beswitched into and out of operation at will, so that the machine may beused without alteration for either plain work, striped work, laced workor combined striped and laced work, and to provide means forautomatically controlling the pattern mechanism of the attachment by themain pattern mechanism which controls the knitting mechanism.

Figure l of the accompanying drawings represents a plan view of aknitting head embodying features of this invention and omitting thesliding sinkers which coperate with the needles, the sinker cams andother parts common to this class of machines and not necessary forillustrating this invention, a portion of the left hand side of theknitting head and of the yarn bracket being broken out. Fig. 9.represents a vertical transverse section of the body of a knittingmachine embodying features of this invention, and a side elevation ofthe bed-plate surmounting said body and of the knitting head supportedthereon. Fig. 3 represents a rear elevation of the bed-plate and partsof the several driving mechanisms of the machine. Fig. l represents avertical section on line L -l vof Fig. 3, showing means for actuatingthe needle switch mechanism which switches one-half, more or less, ofthe needles into inoperative position for pouch knitting and into activeposition for continuous circular knitting. Fig. 5 represents a portionof the mechanism for actuating the yarn-changer to produce circularstripes in the work, including a fragment of the combined striping andlacing pattern chain. Fig. 6 is a diagram showing the lacing cam whichis fixed to the cam cylinder and operates to lift the lacing needlesinto inactive position and also showing the switch finger pivoted to thecam cylinder and operative for bringing said needles into activeposition. Fig. 7 represents fragments of the three forms of needles usedin this machine, one form having a long stud, another a short stud andanother a stud of intermediate length. Fig. 8 represents an enlargedside elevation of the needle switch mechanism attached to the camcylinder, and the slide for actuating said mechanism to produce laceeffects, the switch finger being in elevated position for restoring theneedles to active position. Fig. 9 represents an end view of the partsshown in Fig. 8, the switch finger being in the same position. Fig. l()represents a similar view to Fig. 8, the switch finger being inintermediate position. Fig. ll represents an end view of the samemechanism, the parts being in the same position as in Fig. l0. Fig. l2represents an enlarged side elevation of the needle-switch mechanismattached to the camcylinder, the latter being a quarter turn to theright from the position shown in Fig. 8, the needle studs for switchingthe needles into inactive position, said mechanism being actuated by thenarrowing and widening stud and the switch finger being in its lowestposition ready to engage and lift the needles of half the cylinder intoinactive position preparatory to fashioning for heel and toe. Fig. 13represents an end view of the mechanism shown in Fig. l2 in the sameposition as that ligure. Fig. 14 represents a diagram of a circularseries of needles comprising the different forms of needles used in thismachine arranged Yin one form for performing the work. Fig. l5represents a vertical diametrical section on line 15-15 of Fig. ll ofthe actuating mechanism for the needle switch finger. Fig. 16 representsa horizontal radial section thereof showing the friction device forholding the finger in adjusted position. Fig. 17 represents an enlargedperspective view of a fragment of the duplex striping chain providedwith detachable stud cams for actuating the circular striping mechanismand the longitudinal striping and lacing mechanism.

The same reference characters indicate corresponding parts in thedifferent figures.

This combined striping and lacing attachment may be applied to anycircular knitting machine to which it is applicable. The drawings aredesigned to illustrate it as applied to what is known to the trade asthe New Victor Knitting Machine, the general structure of which is shownin United States Patent No. 537 ,802 having a fashioning mechanismsimilar to that shown in United States Patent No. 596,933, a yarnchangerl similar to that shown in United States Patent No. 580,825 andUnited States Patent No. 694,515, and a striping mechanism similar tothat shown in United States Patent No. 713,370. These patents havereference to circular knitting machines for knitting stockings andsocks, in which the knitting is performed by a circular series ofneedles which are moved up and down in vertical grooves in the needlecylinder under the action of the knitting cams on the cam cylinder,which encircles the needle cylinder, the knitting of the tubular portionof the work, forming the leg and foot, being performed in continuouscircular courses by all the needles under a continuous rotary motion ofthe cam cylinder in the direction of the single-headed arrow of Fig. 1and the pouch knitting or fashioning for the formation of the heel andtoe being performed in arc-shaped courses by a part of the needles underthe reciprocatory motion of the cam cylinder, as indicated by thedouble-headed arrow of said ligure. Any known or suitable means may beemployed for rotating and reversing the motion of the cam cylinder. Suchparts only of the machine as may be necessary to show the connection ofthe duplex striping attachment, are illustrated herein.

The drawings show a needle cylinder 200 supplied with a circular seriesof independent needles of different forms distinguished one from theothers by the difference in length of their lateral studs or butts,whereby they may be actuated by different needleswitch mechanisms fordifferent purposes. One half of the needle cylinder, say the right handhalf, is furnished with needles 50 having short-studs 51 and the otherhalf of the cylinder, say the left hand half, is supplied with two formsof needles, the medium needles 60 ,having lateral studs 61 of mediumlength and the long-stud needles having long lateral studs 71. All thecircular series of needles coperate in continuous circular knitting,`the short-stud needles forming the back of the leg and bottom of thefoot and the medium and long-stud needles forming the front of the legand the top of the foot; and the shortstud needles act exclusively infashioning or reciprocatory knitting to form the pouches constitutingthe heel and toe, the other forms of needles being switched out ofaction during such knitting. The longstud needles are switched intoinactive osition at intervals in the circular knitting and brought backinto position after receiving a plurality of cross threads to formlacework or longitudinal stripes. Certain needles may be omitted fromthis part of the cylinder and their spaces may or may not be filled withstudless blank needles 80 as shown in Fig. 14, whereby open work may beformed at parts of the tubular fabric where such omissions occur.

The cam cylinder 240 is provided with the ordinary knitting cams notherein shown for reciprocating the needles vertically to produce thestitches such for instance as those shown in Patent No. 537 ,802 andwith narrowing and widening cams and mechanism for actuating them notherein shown for switching the short-stud needles 50 separately or inpairs into and out of action for the fashioning or pouch knitting suchfor instance as those shown in Patent No. 596,933, The cam cylinder isalso provided with needle switch mechanism similar' to that shown inUnited States Patent No. 566,295 and with two separate actuatingmechanisms therefor, one of said mechanisms being similar to that shownin said patent for lifting all the needles as 60 and 70 at the left handside of the cylinder at once into inactive position preparatory to pouchknitting to produce the heel or toe and for lowering all of said needlesat once into active position for tubular knitting for the leg or foot.This old actuating mechanism which is controlled in the ordinary mannerby the main pattern chain 390, comprises a switch iinger 260 curved tocorrespond with the curvature of the inner face of the cam cylinder andiiXed to the inner end of a pivot shaft 261 journaled in a bracket 262secured to the outer face of said cam cylinder. This bracket has a boss262al to which a friction disk or collar 262b is secured. This pivotshaft 261 has an enlarged split or slotted inner end which projects intothe wall of the cam cylinder at the junction of two sectoral slots 264and 265 therein. The switch finger 260 is of a length to extend from thearc-shaped end of one slot to the arc-shaped end of the ot-her, and asits pivot is turned the body of the finger swings in the larger slot andthe shank in the opposite direction in the smaller slot, there being nochance for endwise displacement. The inner edge of this switch lingerprojects beyond the inner face of the cam cylinder sufficiently toengage both the long-stud needles 7 O and the medium-stud needles 60,but the short-stud needles 50 pass said switch linger without contacttherewith.

A yoke 266 is fixed to the pivot shaft 261 outside the bracket 262 andthe pivot shaft l is made tight by friction in its bearings s0 as toremain in adjusted position. For this purpose the yoke is provided atits back with a disk or plate 266@L which covers the outer face oftheboss 262% This disk has sockets open on its inner face in which aredisposed springs 262b and friction pins 262C. The friction pins areforced by the springs against the face of the disk 262b with suflicienttension to hold the yoke in adjusted position. Or the yoke may beprovided with other means for holding it in adjusted position, such forinstance as the means shown in said Patent 566,295. A trip arm 261 ishung loosely on the pivot shaft and depends between .the arms of theyoke, being provided with a pointed lower end adapted to be engaged by amovable actuating rod 460, which projects upward through the baseplate30 at the right hand side of the machine. rThis rod is moved at propertimes under the action of suitable mechanism for that purpose,controlled by the main pattern chain, into and out of the path of thearm 261. Vhen the rod 460 projects into said path, the arm 261, duringthe rotation of the cam cylinder, comes in contact with said rod and isthereby caused to swing to one side carrying with it the yoke 266,whereby the pivot shaft 261 is turned and the switch finger 260 swunginto either of its two extreme positions as the case may be, it beingthrown into its downward position on its forward stroke during thecontinuous forward motion of the cylinder in circular knittingpreparatory to reciprocatory knitting and into upward position in thebackward motion of the cylinder at the end of the reciprocatory knittingpreparatory to the resumption of circular knitting. As soon as the arm261 is carried in either direction over the end of the rod 460, beinghung loosely on its pivot, it falls into normal low position ready toengage said rod from the opposite direction when the latter is nextprojected into its path. The adjustable contacts or screws 267 and 268regulate the j length of the throw of the yoke. The means herein shownfor lifting the rod 460 into the path of the arm 261 are similar tothose shown in said Patent 566,295 and comprise a lever 465 pivoted atits front end on an inwardly projecting stud 467 on the inner face ofthe end 20 of the frame. This lever rests in normal position on a boss468 or other suitable stop on the end frame 2O and it extends backward,downward and outward, its lower rear end being normally in the path ofthe cams 463 and 464 on a cam disk 461 disposed on a cam shaft 450 andin this instance outside of the end frame 20. This lever 465 is providedwith a ledge 469, fixed to its upper side about midway between its pivotand its lower end and the rod 460 rests at its lower end on this ledge,and a spring 466 operates to hold it normally in depressed position.Thus far the needle switch mechanism and its actuating devices aresubstantially the same as those shown in United States Patent 566,295,excepting the means for holding the yoke in adjusted position.

1n a machine provided with this combined striping` and lace-workmechanism otherwise termed a duplex striping mechanism, the cam cylinder240 which rotates and reciprocates around the needle cylinder, isprovided in addition to the other cams and devices heretofore referredto with a supplemental cam 90 herein termed the lacing cam. This lacingcam consists of a thin strip of metal curved to correspond with thecurvature of the cam cylinder and attached to the inner face thereof.This lacing cam has an inclined upper edge or cam surface extending fromits lowest point adjacent to the rear of the knitting cams consideredwith reference to the continuous rotation of the cam cylinder to itshighestpoint adjacent to the pivoted switch finger 260. This lacing camis sufficiently thin to permit the shortstud needles 50 and theintermediate needles 60 to pass it without engagement and of suliicientthickness or projection to extend into the path of the long-stud lacingneedles 70. Therefore all said long-stud needles ride up this cam intoinactive position immediately after passing the knitting cams and toform the tuck-stitch or lace-work they are allowed to remain upward inthis inactive position until the cam cylinder makes several rotationsand lays two or more threads across the breasts of said needles. Thenthe switch linger 260 is swung into its upward position and engages thelong-stud needles and brings said needles down into active positionwhere they are engaged by the knitting cams as the latter come around onthe next turn of the cam cylinder. The stitches then formed under theaction of knitting cams constitute the tuck-stitching or lace-work andconsist of elongated loops which embrace the several plain threads whichwere laid over the breasts of the needles. After this course of stitchesis formed the switch linger 260 is swung into intermediate position asshown in Figs. 10 and 11 and the lace needles 70 are again lifted intoinactive position by the lacing' cam 90 on the next turn of the camcylinder. The switch linger is allowed to remain in intermediateposition until several more courses of threads are laid across knittingof plain work or plain lace-work composed simply of open stitches, theswitch finger is swung in upward position so as to bring back thelong-stud needles for the action of the knitting cams at each revolutionof the cam cylinder.

The new and supplemental actuating mechanism for the switch finger 260for adjusting it in its upward and intermediate positions to provide forthe tuck-stitch or lace-work as hereinbefore set forth, will now bedescribed. The pivot shaft 261 is provided back of the yoke 266,preferably on the disk 266a with a lateral stud 267. This yoke is alsoprovided on its front face at a point about diagonally opposite the stud267 with an outwardly projecting stud 268 preferably provided with ananti-friction roller. The means for engaging the front stud 268 of theyoke 266 and the lateral stud 267 thereof are preferably combined on asingle radial cam slide 270 supported in a horizontal bracket 280secured to the bed-plate 30 at the front of the machine. This cam slidehas an elevated cam 272 adapted to engage the front stud 268 and it alsohas a tongue 275 extending inward toward the cam cylinder and providedwith a cam 277 at its inner end adapted to engage the lateral stud 267.These cams are in such relation each to the other that when one is inthe path of the stud which it is designed to engage, the other is out ofthe path of the other stud. When the cam slide is in its outermost orinactive position, both the cams are respectively outside the circlestraveled by the studs referred to as shown in dotted lines in Fig. S.When said cam slide is moved inward to its intermediate position, thecam 277 on the inner end of its tongue is in the path. of the lateralstud 267 and when said cam slide is adjusted at its innermost position,said cam 277 is inside the path of said pin 267 and the elevated cam 272is in the path of the front stud 26S. This cam slide 270 is provided onits underside with a stud 271 which is engaged by mechanism foractuating the slide. The actuatingmechanism shown com prises ahorizontally swinging lever 290 pivoted at one end to an arm 300attached to the underside of the bed-plate 30. This lever is provided atits free end with a slot 291 shown in dotted lines which engages thestud 271 of the cam slide 270. A spring 295 is connected at its frontend to the horizontal lever 290 and at its rear end to the bedplate andnormally operates to pull said lever toward the machine and hold thecamslide in inward position so that its elevated cam 27 2 may be engagedby the front stud 268 of the yoke 266 to swing the switch finger 260into upward active position. A rod 310 is pivoted at its front end tosaid horizontal lever and at its rear end to a lever 320 pivoted aboutmidway of its length on a rod 330 supported in dependentbrackets 331 and332 attached to the bedplate 30. The lower end of this lever rides onlacing projections or cams as 996 disposed on the left side of astriping pattern chain 990. This striping pattern chain may be similarto the one shown in Patent- 713,370 except that in addition to thestriping lugs or cams 993 or 993 as numbered in said patent said chainis provided with these lacing cams as 996, which may be in the form ofstuds attached to the lugs referred to. These lacing cams are disposedon the cam links 993 of the chain in such groups or distances apart asmay be necessary to actuate the cam slide for shifting the lace needlesto produce the desired design in the work.

The auxiliary duplex striping pattern chain 990 is preferably composedof links having a continuous series of full-len th lugs provided atintervals with detacha le screw-stud cams 994 on the right side forchanging the yarn to produce circular stripes and with a series ofdetachable screwstud cams 996 on the left side of the same cam platesfor shifting the switch iin A er to produce longitudinal lace-work orongitudinal stripes. The cams 994 for the circular striping and the cams996 for lacing or longitudinal striping may be so arranged in relationto each other that longitudinal stripes in colors may be produced downthe front of the leg or top of the foot or both in continuous circularknitting while horizontal stripes in colors are produced at the back ofthe leg or bottom of the foot or both. This is accomplished by havingboth such cams arranged to act simultaneously; so as to shift the threadand the switch finger at the same time or between the saine two turns ofthe cam cylinder, the parts being so arranged that after the striping isbegun the long-stud needles are always supplied with thread or yarn ofone color only. In this way the long loops made by said needles will befolded over the cross threads of another color. The cross threads whichare laid against the breast of the longbutt needles while the latter arein inactive position are thrown to the rear of the fabric and covered bythe long loops which overlie said cross threads. Thus lengthwise stripesof one solid color are formed. Between these solid color stripes arestripes composed mainly of another color but showing both colors, theother color being in blocks separated from one another by slightlyvisible loops of the same color as the solid stripes. For instance:assuming that a sock is to be made of a main thread of black and anauxiliary striping or lacing thread of white, the knitting starts say atthe top of the leg, and the black thread is supplied to all the needles,the switch nger 260 being in upward active position and operating topull down the long stud needles into active position at each turn of thecam cylinder. As many courses as may be desired are thus knit in solidblack. Then the duplek striping pattern chain 990 is brought intooperation as described in said Patent 713,370 and a cam as- 994 thereonactuates the yarn changing mechanism and changes the yarn from bilack towhite. Then the white thread is fed to all the needles and theshort-stud needles 50 regularly knit a plain fabric in white forming aWhite horizontal stripe at the back of the leg, of say two to jivecourses as desired, while the medium needles 60 and long-butt needles 70form a corresponding number of wales across the front of the leg. Thenthe striping pattern chain actuates the yarn changer and shifts the feedback to the black thread and on the same turn of the cam cylinder alacing cam as 996 on the striping chain actuates the switch Enger 260and shifts it into inactive position as shown in Fig. l0 and thelong-stud needles 70 are allowed to remain up out of action as thrown bythe lacing cam 90. Then the black thread is fed to the short-studneedles 50 in active position and to the medium stud needles 60 also inactive position and laid across the breasts of the stationary inactivelong-stud needles 70.

The short-studl needles regularly knit a plain fabric in black forming ablack hori- Zontal stripe at the back of the leg and the intermediateneedles regularly knit detached portions of regular fabric correspondingto their several groups and connected by the straight strands of thesame courses laid across the breasts of the long-butt needles asaforesaid. Then another yarn changing cam as 994 on the striping patternchain shifts the yarn back to white and another switch finger cam as 996on said chain swings the switch finger 260 upward and the long studneedles 7 0 are brought down into active position and are then engagedby the knitting cams and long loops of white thread are formed which-embrace the several breast threads of black on said needles, throwingsaid black threads to the rear of the fabric and forming longitudinalstripes of white on the front thereof. The forming of these long loopsfrom the white threads of the previous white supply causes the whitestitches formed 0n the medium stud needles 60 during such previous whitesupply to be drawn taut and the breast threads tend to spread so thatcomparatively little white appears in the front of the stocking betweenthe stripes of white formeel by the long-stud needles. All the needlesare in action during this feeding of white yarn which may be for fromtwo to five courses more or less. This operation is continued down theleg if desired and may be resumed in the knitting of the tubular portionof the foot.

Means are provided for actuating the cam slide 270 direct from the mainpattern chain 390 for throwing the lacing mechanism out of use for heeland toe knitting or other purposes. This mechanism comprises a lever 340pivoted on the rod 330 and provided at its upper end with a lateral stud341 which projects behind the rear end of the rod 310, the lower end ofsaid lever resting on the main pattern chain 390. This main patternchain may be similar to the main chain of the same number in Patent713,370 and it is provided at proper intervals with cams as 345 hereinfor actuating said lever 340 to shift the cam slide 270 into suchposition as to bring the cam 277 at the inner end thereof into positionto be engaged by the lateral stud 267 for swinging the switch finger 260into horizontal inactive position.

The yarn changing mechanism for forming the circular stripes is operatedas in Patent 713,370 through a pawl 1000 which is engaged by the cams as993 on the right side of the striping pattern chain 990 or by the studsas 994 attached to the plate secured to some of said links. The-se camsmay carry the projections 996 for operating the lace mechanism. v

1 claim as my invention:

1. The combination of a needle cylinder, a circular series of needlesdisposed therein comprising a series of short-stud needles, and a seriesof medium-stud needles and long-stud needles interspersed according tothe design to be produced, a cam cylinder provided with a supplementalneedle-lifting cam disposed behind the knitting cams and adapted toengage the long-stud needles to carry them out of range of the knittingcams and permit the medium stud needles and the short-stud needles topass without action, and means for shifting at determined intervals thelong-stud needles into active position independently of both the otherforms of needles.

2. In a knitting machine, the combination of a needle cylinder, acircular series of needles disposed therein comprising a series ofshort-stud needles and a series of longstud needles and medium-studneedles interspersed according to the design to be produced, a camcylinder provided with a supplemental cam disposed back of the knittingcams and adapted to lift the long-stud needles into inactive positionand to escape the short-stud and medium-stud needles, a pivoted switchfinger mounted on said cam cylinder and adapted to engage both themedium-stud needles and the long-stud needles, primary means forswinging said switch finger into oppositely inclined positions forjointly switching said mediumstud needles and long-stud needles into andout of active position, and a secondary means for swinging said switchfinger into intermediate neutral position and into position forrestoring the long-butt needles to active position at determinedintervals.

3. In a knitting machine, the combination of a needle cylinder, acircular series ot' needles disposed therein comprising a series ofshort-stud needles and a series of long-stud needles and inedium-studneedles interspersed according to the design to be produced, a camcylinder provided with a supplemental cam disposed back of the knittingcams for liftingl the long-stud needles into inactive position, andadapted to escape the short-stud and medium-stud needles, a pivotedswitch finger mounted on said cam cylinder and adapted to engage boththe medium-stud needles and the long-stud needles, primary meanscontrolled by the main pattern chain for swinging said switch fingerinto oppositely inclined positions for jointly switching saidmedium-stud needles and long-stud needles into and out of activeposition, and a secondary means controlled by an auxiliary pattern chainfor swinging said switch linger into intermediate neutral position andinto position for restoring the long-butt needles to active position atdetermined intervals.

4. In a knitting machine, the combination of a needle cylinder, acircular series of needles disposed therein comprising a series ofshort-stud needles and a series of longstud needles and medium-studneedles interspersed according to the design to be produced, a camcylinder provided with a supplemental cam disposed back of the knittingcams for lifting the long-stud needles into inactive position, andadapted to escape the short-stud and medium-stud needles, a pivotedswitch finger mounted on said cam cylinder and adapted to engage boththe medium-stud needles and the long-stud needles, primary meanscontrolled by the main pattern chain for swinging said switch fingerinto oppositely inclined position for jointly switching said medium-studneedles and long-stud needles into and out of active position, asecondary means controlled by an auxiliary pattern 'chain for swingingsaid switch finger into intermediate neutral position and into positionfor restoring the longbutt needles to active position at determinedintervals, and a supplemental actuating mechanism controlled by the mainpattern chain for operating said secondary means at other intervals.

5. The combination of a cam cylinder, a pivot-shaft journaled therein, aswitch finger connected to the inner/end of the shaft, a yoke xed onsaid pivot-shaft outside said cylinder, an arm hung loosely on saidpivot-shaft between the arms of said yoke and adapted for contact witheither of said yoke arms for oscillating said pivotshaft, means forengaging said arm for swinging said switch nger into differentposit-ions, two studs'on said yoke, a cam slide provided with two camsfor respectively engaging said studs, and means for shifting said camslide into position for both cams to escape both said studs, intoposition for one of its cams to engage one of said studs and intoposition for the other cam to engage the other stud.

6. The combination of a cam cylinder, a pivot-shaft journaled therein, aswitch finger xed to the inner end of said pivot-shaft, two studsconnected with said pivot-shaft, a cam slide provided with two cams forengaging said studs respectively, and means for shifting said cam slideinto positions to cause both its cams to escape said studs or either toengage its respective stud.

7. The combination ofa cam cylinder, a pivot-shaft journaled therein, aswitch finger fixed to the inner end of said pivot-shaft, two studsconnected with said pivot-shaft, a cam slide provided with two cams forengaging said studs respectively, and means controlled by the mainpattern chain of the machine for shifting said cam slide into threedifferent positions.

8. The combination of a circular knitting pivotmechanism, a plurality ofyarn feeds therei WILLIAM P.- YOUNG. Witnesses F. C. SoMEs, WALTER F.HENRY.

